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havefinvente` ew and usefu-ljlmproveinentiniFerryridges and IIiiloliereby de claresjthat: thef following1 is a full, clear, and

ing had y to@ the accompanying i drawings, forming par f this` Specifiaaon, in

tf1-legumi i floatvfof ai ferryibridge, construted after my invent-ion; FiglQ, is awertical longitudinal section of; the `sanne tioiiqof` theflsnie.

. `Sii'nilar"letters of several igures indicate corresponding` parts.

`designed to "prevent all pos-4 sengersl,` or vehicles passing Y 5 Sibiiicy hernature` of said invention consists, 1st, providingvon* the lioat a central `gate sus` al mevable eciprocating carriage y ar-` ranged to; ni

being'` arranged "and `conibine'ed subh a Vman`V Y `nertha-tf@lwlien .the boatconi'esinto the dock it shall vnecessarilystrike"against the end of thelatterqand" forcent*,inward'and consef quentlyfeause,theside "gatesto turn horii descend verticallytillllits upper 4edge stands feven `with ."thetopsurface offtheyfloat, and

boat starts shall be `caused `by .the` action of theweightsaon thecentral gate, `to assume its original position and indoing soto close the ing his life by trying ojuinp upon the boat afterit-lhas fstartedi;

- stead ofyforcingthemfup againstthe railing and crushingjthein.

i l Be `it knownl 1I, "HENRY" LAWRENCE, of theficity,` "county ndi State of` `New York,

exactfidescriptionu offithe same, reference be`` `a lan` or "view` ofthe` l Fig.3, is a side i elevareference in each of the invention? relatestothe floats of ferry faipon Ioat lifter"itfhasstartedandtherel` roin passengers ende-avoring v imp upon the lboat affter itlhas started. lf

` pendedat` each 1sideblby.a` chain and heavy f weight and swinging side gates andl y y between. the timbers Vlflooringof thefloat; `said gates and carriage` ""lzontallylancl openuanjdfthe central gate "to thusfj allow the "passengers," to ,and from the boat a freepassage, and then the instantthe gates and. thereby preventany person risk-i skilled in the `art to make @SAFETY FERRY-Bienen. i f

si) in bien gf Lette'sratent ivd. raises, dated Marci; is, i855.

,i and use inventionfl `will proceed deg scribe its construction and operation.4

. 'TE STATES OFFXCE. i

j i Arepresentsthe float hinged to the bridge v lini the wusualjinanner. y

Bjis1 the central and C, Care vthe side gates;` e i D, D', are the weights and `chains by which the central .gate is suspended.

' EfE, are pulleys for the chainsD, D, to

F, F, arefthefrods or` axes upon which the` i Gr,` is the reciprocating carriage. i

` "H,H, H, H', are rails provided on `the `larriage, G and on the timbers a, a, `of the oat.

" "1,11, I,"I, are'` grooved wheels for the i carriage `to run upon `and be guided by, those lylbeing on the carriage Gr and those I', I

onfA the float, c y

.d/J; are slottedarins4 for connecting the rside gateslto thefearriage;`

` K, are bands 'or` chains `the centralgateto the carriage Gr.

Lais a transverse rod for said bands ory "chains to pass under` as the gate descends."` The reciprocating carriage is made to correspondfat its frontend with the end of the boat and `also `is' similar inshape to the end of the float.` Itextends a shortldistancee be` yond the end-lof the float so as @to have suiifor connecting i y cientl movement to o'pen the gates. `The rails i H,zfwhich are formed on the carriage, are only made to extend a'short distance beyond the wheels I, I, yas it is not requisite to have them extend farther as other rails `are provided on thetimbers a, a, of the float. `The wheels I, I, are arranged on the carriage instead of on" the float, so that the carriage` shall` always be guided in its back and forward ymovements.. `The side gates are inadeofy a curved shape so as to avoid crush- ,ingpassengers to death. The lower ends of the axes orrods F, F, uponv which the `gates turn are `made `square and Vhave the slotted arms J,"J, 'secured on them, said Iarms being also attached to the carriage Gr` ico by pins d, d, which work loosely in the slots e, e.` `By providing the slot e, in thearm J,

" provision is made for the decrease in the dis- `tance from the axis of the side gateto the pin E when the arin comes in line with the central gate o-r as the carriages traverseback and forth. By connecting `the carriage to theffside gates by the arms J, J, the latter will fbe opened and closed at every complete movement of-the former. The central gate or stop by being connected to the carriage by chains or bands K, K, and suspended by weights D, D, in the manner shown can be raised or lowered at every complete movement of the carriage. The chains or bands K pass down from the top of the gate to the rod L and pass under the same at right angles to the gate and are attached fast to the head of the carriage and owing to their being attached to the carriage and gate serve through the agency of the weights to return the carriage to its proper positio-n for being operated upon by the boat they also serve for lowering the gate when the carriage is forced inward.

The operation is as follows:-The carriage by the action of the weights, occupies the position shown by black color in Figs. l, 2 and 3, and the gates consequently are closed, when the boat is not in dock. Now suppose a boat enters the dock, and comes up close to the ioat, it must necessarily strike the end of the carriage and cause it to occupy the position shown in red in Figs. l and 2 in doing which it causes the arms J, J, to occupy the position shown in red in Fig. l, and the side gates consequently to be opened. The central gate was also drawn by the same movement down out of sight by the bands K, K, as shown in red in Fig. 2, and the weights elevated. All the gates being opened passengers have a free passage to and from the boat while it is fas` tened to the bridge. The time having arrived for the boat t'o start it is let loose. As the boat moves out from the dock the carriage is forced outward, by the weights acting upon and raising the central gate, and caused to operate upon the slotted arms and through them close the side gates, and thus prevent any person coming near enough to the boat to risk his life in jumping upon it. In case a person should be thought-less enough to catch hold of the circular gate C or occupy a position similar to that shown at f, at the moment the boat comes in and the gate should suddenl open he would be 'thrown backward or o as shown at f in red, whereas if a person should lay hold of the flat gate C, or occupy the place shown at g, under similar circumstances, he would be forced against the railing and crushed as illustrated at g in red. In case the float should fall too low to admit of the carriage being operated by the end of the boat it is `operated by rods provided on t-he bow of tially as and for the purposes set forth.

2. I also claim making the side gates of a circular form instead of flat, so that in case 'drunken or thoughtless men lay -hold of them, or get in a position to interfere with their being opened freely, they shall as they open have a tendency to throw them olf instead of forcing them up against the railings and crushing them, substantially as set forth.

HENRY LAWRENCE.

IVitnesses:

I. W. CooMs, I. G. MASON. 

